Boy, oh, boy. I was ready to write a big long rant about this but I don't think I want to commit the time or effort.
We realize that putting this odd code text into your feed means that all of your feed followers (and perhaps Twitter, Facebook, and other sites) will see it, but it's the best method we've found so far to demonstrate to us that you control the blog.
Read more: http://technorati.com/blog-claiming-faq
The best method you've found so far? Really? Really? I can think of several reasons for why you wouldn't want to do it that way, and at least 2 methods that are far superior. From both a "more reliable way of making sure the correct person is claiming", and a "no impact to the blogs readers" standpoint.